small coal mines 小煤矿 ; 小煤窑
small-coal pit 小煤窑
small coal pits 小煤窑
small-coal mine 小煤矿
small coal mine 小煤矿
stove small coal 火炉小块煤
small coal enterprises 小型煤炭企业
small coal-fired units 小火电燃煤机组
I found a small coal black bird in the grass.
我在草丛中发现了一只黑色的小鸟。
The application of simple hydraulic prop in the face of small coal mine is expounded.
阐述了单体液压支柱在小型煤矿工作面支护中的应用。
The biggest push concerns small coal mines, in which thousands of workers perish every year.
最大的推动力是关于小煤窑的,每年有几千人因它死亡。
应用推荐